Re: [Qgis-user] Question about city layer density

2016-04-03 Thread Joris Hintjens 
HOLD IT!
From what I read, you misunderstood Szilard’s answer. You don’t need different 
layers per class of city magnitude. Within one layer, you ca ncreate scalable 
visibilty according to a property (number of inhabitants).

But why not use a simpler way: use an existing background layer (OSM or other) 
that hat scalable visibility already in the layer? I personaly like "OSM Stamen 
toner” for its slick black rendering
Joris



> Op 3 apr. 2016, om 14:13 heeft Joe Stepansky <k...@comcast.net> het volgende 
> geschreven:
> 
> Thank you Szilard. I knew about the scale dependent visibility, but hadn’t 
> considered creating layers with different size cities and different 
> visibility levels. That should work just fine. 
>  
> Joe
>  
> From: szilard.alb...@gmail.com [mailto:szilard.alb...@gmail.com] On Behalf Of 
> Szilard Albert
> Sent: Sunday, April 03, 2016 7:30 AM
> To: Joe Stepansky
> Cc: qgis-user@lists.osgeo.org
> Subject: Re: [Qgis-user] Question about city layer density
>  
> Joe,
> what you seem to need is "scale dependent visibility".
> To achieve this, go to "layer properties", "general" tab, and enable "scale 
> dependent visibility".
> Set your scales as preferred. This will show or hide all your cities, 
> depending on the zoom level, 
> but you can make different layers with different classes of cities, and 
> enable/disable their
> visibility at different zoom levels.
> regards,
> Szilard
>  
> On 3 April 2016 at 21:01, Joe Stepansky <k...@comcast.net 
> <mailto:k...@comcast.net>> wrote:
> I’m relatively new to QGIS, so forgive any naivete.
>  
> I’m working on a project displaying severe weather outlooks on a map of the 
> US. It’s gone very well, but I have one issue. I’m using a layer which 
> displays city locations and labels on the map. When zooming in to a specific 
> state, all looks fine. But when I pull back to several states, the map can 
> look cluttered with city points and labels.
>  
> The labels don’t run into each other, there are just so many of them when I 
> zoom out. Is there some way to get QGIS to automatically remove “random” 
> cities (I really don’t care which ones) as the map is zoomed out, and restore 
> them as the map is zoomed in?
>  
> Right now I’m manually using a filter to remove “excess” cities, but I can’t 
> seem to find a nice, automated solution.
>  
> Thanks for any help!
>  
> Joe Stepansky
> Harrisburg, PA
> 
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> 
> -- 
> Szilard Albert
> www.dayborogeo.com <http://www.dayborogeo.com/>
> Phone: +61 7 3889 9505
> Mobile: +61 403 860274
>  
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Re: [Qgis-user] Question about city layer density

2016-04-03 Thread Nicolas Cadieux 
Hi, 
I don't have Qgis front on me but you can use expressions for scale 
rendering of labels. ($scale). I think we can also do that with 
conditional formats objects properties. You could set object to become 
transparent depending on the expression. The below link is for labels but 
the same should apply to object formating... (I am pretty sure this is not a 
figments of my Imagination.) This way, you could use only one 
layer. 
http://lists.osgeo.org/pipermail/qgis-user/2013-November/024825.html 
Nicolas 
On Apr 3, 2016 08:00, Joe Stepansky [via OSGeo.org] 
ml-node+s1560n525936...@n6.nabble.com wrote: 

Thank you Szilard. I knew about the scale dependent visibility, but 
hadn’t considered creating layers with different size cities and different 
visibility levels. That should work just fine.   Joe   From: [hidden email]  
[mailto: [hidden email] ] On Behalf Of Szilard Albert Sent: Sunday, April 03, 
2016 7:30 AM To: Joe Stepansky Cc: [hidden email] Subject: Re: [Qgis-user] 
Question about city layer density   Joe, what you seem to need is scale 
dependent visibility. To achieve this, go to layer properties, 
general tab, and enable scale dependent visibility. Set 
your scales as preferred. This will show or hide all your cities, depending on 
the zoom level, but you can make different layers with different classes of 
cities, and enable/disable their visibility at different zoom levels. regards, 
Szilard   On 3 April 2016 at 21:01, Joe Stepansky  [hidden email]  
wrote: I’m relatively new to QGIS, so forgive any naivete.   I’m working on a 
project displaying severe weather outlooks on a map of the US. It’s gone very 
well, but I have one issue. I’m using a layer which displays city locations and 
labels on the map. When zooming in to a specific state, all looks fine. But 
when I pull back to several states, the map can look cluttered with city points 
and labels.   The labels don’t run into each other, there are just so many of 
them when I zoom out. Is there some way to get QGIS to automatically remove 
“random” cities (I really don’t care which ones) as the map is zoomed out, and 
restore them as the map is zoomed in?   Right now I’m manually using a filter 
to remove “excess” cities, but I can’t seem to find a nice, automated solution. 
  Thanks for any help!   Joe Stepansky Harrisburg, PA 
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Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user -- Szilard 
Albert www.dayborogeo.com Phone: 61 7 3889 9505 Mobile: 61 403 860274 
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Re: [Qgis-user] Question about city layer density

2016-04-03 Thread Joe Stepansky 
Thank you Szilard. I knew about the scale dependent visibility, but hadn’t 
considered creating layers with different size cities and different visibility 
levels. That should work just fine. 

 

Joe

 

From: szilard.alb...@gmail.com [mailto:szilard.alb...@gmail.com] On Behalf Of 
Szilard Albert
Sent: Sunday, April 03, 2016 7:30 AM
To: Joe Stepansky
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Question about city layer density

 

Joe,

what you seem to need is "scale dependent visibility".

To achieve this, go to "layer properties", "general" tab, and enable "scale 
dependent visibility".

Set your scales as preferred. This will show or hide all your cities, depending 
on the zoom level, 

but you can make different layers with different classes of cities, and 
enable/disable their
visibility at different zoom levels.
regards,

Szilard

 

On 3 April 2016 at 21:01, Joe Stepansky <k...@comcast.net> wrote:

I’m relatively new to QGIS, so forgive any naivete.

 

I’m working on a project displaying severe weather outlooks on a map of the US. 
It’s gone very well, but I have one issue. I’m using a layer which displays 
city locations and labels on the map. When zooming in to a specific state, all 
looks fine. But when I pull back to several states, the map can look cluttered 
with city points and labels.

 

The labels don’t run into each other, there are just so many of them when I 
zoom out. Is there some way to get QGIS to automatically remove “random” cities 
(I really don’t care which ones) as the map is zoomed out, and restore them as 
the map is zoomed in?

 

Right now I’m manually using a filter to remove “excess” cities, but I can’t 
seem to find a nice, automated solution.

 

Thanks for any help!

 

Joe Stepansky

Harrisburg, PA


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-- 

Szilard Albert

www.dayborogeo.com

Phone: +61 7 3889 9505

Mobile: +61 403 860274

 

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Re: [Qgis-user] Question about city layer density

2016-04-03 Thread Szilard Albert 
Joe,
what you seem to need is "scale dependent visibility".
To achieve this, go to "layer properties", "general" tab, and enable "scale
dependent visibility".
Set your scales as preferred. This will show or hide all your cities,
depending on the zoom level,
but you can make different layers with different classes of cities, and
enable/disable their
visibility at different zoom levels.
regards,
Szilard

On 3 April 2016 at 21:01, Joe Stepansky  wrote:

> I’m relatively new to QGIS, so forgive any naivete.
>
>
>
> I’m working on a project displaying severe weather outlooks on a map of
> the US. It’s gone very well, but I have one issue. I’m using a layer which
> displays city locations and labels on the map. When zooming in to a
> specific state, all looks fine. But when I pull back to several states, the
> map can look cluttered with city points and labels.
>
>
>
> The labels don’t run into each other, there are just so many of them when
> I zoom out. Is there some way to get QGIS to automatically remove “random”
> cities (I really don’t care which ones) as the map is zoomed out, and
> restore them as the map is zoomed in?
>
>
>
> Right now I’m manually using a filter to remove “excess” cities, but I
> can’t seem to find a nice, automated solution.
>
>
>
> Thanks for any help!
>
>
>
> Joe Stepansky
>
> Harrisburg, PA
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>



-- 
Szilard Albert
www.dayborogeo.com

Phone: +61 7 3889 9505
Mobile: +61 403 860274
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[Qgis-user] Question about city layer density

2016-04-03 Thread Joe Stepansky 
I'm relatively new to QGIS, so forgive any naivete.

 

I'm working on a project displaying severe weather outlooks on a map of the
US. It's gone very well, but I have one issue. I'm using a layer which
displays city locations and labels on the map. When zooming in to a specific
state, all looks fine. But when I pull back to several states, the map can
look cluttered with city points and labels.

 

The labels don't run into each other, there are just so many of them when I
zoom out. Is there some way to get QGIS to automatically remove "random"
cities (I really don't care which ones) as the map is zoomed out, and
restore them as the map is zoomed in?

 

Right now I'm manually using a filter to remove "excess" cities, but I can't
seem to find a nice, automated solution.

 

Thanks for any help!

 

Joe Stepansky

Harrisburg, PA

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